Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source
As a continuation of our earlier paper, we consider here the case of the excitation of standing Alfvén waves by a source of the type of sudden impulse. It is shown that, following excitation by such a source, a given magnetic shell will exhibit oscillations with a variable frequency which increa...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
1998-08-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/16/914/1998/angeo-16-914-1998.pdf |
| _version_ | 1819099352925208576 |
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| author | A. S. Leonovich V. A. Mazur |
| author_facet | A. S. Leonovich V. A. Mazur |
| author_sort | A. S. Leonovich |
| collection | DOAJ |
| description | As a continuation of our earlier paper, we
consider here the case of the excitation of standing Alfvén waves by a source
of the type of sudden impulse. It is shown that, following excitation by such a
source, a given magnetic shell will exhibit oscillations with a variable
frequency which increases from the shell's poloidal to toroidal frequency.
Simultaneously, the oscillations will also switch over from poloidally
(radially) to toroidally (azimuthally) polarized. With a reasonably large
attenuation, only the start of this process, the stage of poloidal oscillations,
will be observed in the ionosphere.<br><br><b>Key words.</b> Ionosphere-magnetosphere interactions ·
Wave propagation · MHD waves and instabilities</p> |
| first_indexed | 2024-12-22T00:45:31Z |
| format | Article |
| id | doaj.art-129b815fe51d439b95764ebed9e4ec69 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-22T00:45:31Z |
| publishDate | 1998-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-129b815fe51d439b95764ebed9e4ec692022-12-21T18:44:34ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05761998-08-011691492010.1007/s00585-998-0914-zStanding Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary sourceA. S. Leonovich0V. A. Mazur1Institute of Solar-Terrestrial Physics (ISTP), Russian Academy of Science, Siberian Branch, Irkutsk 33 P.O.Box 4026, 664033 Russia e- mail: leon@iszf.irk.ruInstitute of Solar-Terrestrial Physics (ISTP), Russian Academy of Science, Siberian Branch, Irkutsk 33 P.O.Box 4026, 664033 Russia e- mail: leon@iszf.irk.ruAs a continuation of our earlier paper, we consider here the case of the excitation of standing Alfvén waves by a source of the type of sudden impulse. It is shown that, following excitation by such a source, a given magnetic shell will exhibit oscillations with a variable frequency which increases from the shell's poloidal to toroidal frequency. Simultaneously, the oscillations will also switch over from poloidally (radially) to toroidally (azimuthally) polarized. With a reasonably large attenuation, only the start of this process, the stage of poloidal oscillations, will be observed in the ionosphere.<br><br><b>Key words.</b> Ionosphere-magnetosphere interactions · Wave propagation · MHD waves and instabilities</p>https://www.ann-geophys.net/16/914/1998/angeo-16-914-1998.pdf |
| spellingShingle | A. S. Leonovich V. A. Mazur Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source Annales Geophysicae |
| title | Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source |
| title_full | Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source |
| title_fullStr | Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source |
| title_full_unstemmed | Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source |
| title_short | Standing Alfvén waves with m ≫ 1 in an axisymmetric magnetosphere excited by a non-stationary source |
| title_sort | standing alfven waves with m x226b 1 in an axisymmetric magnetosphere excited by a non stationary source |
| url | https://www.ann-geophys.net/16/914/1998/angeo-16-914-1998.pdf |
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